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M. P. DORSCH. Stove for'Soft Coal.

Patented July 27, 1858.

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M. P. DORSGH, OF NEW YORK, N. Y., ASSIGNOR TO PETER DORSGH, OF SGHENEOTDY, NEW YORK.

. i i i STOVE FOR BURNING- SOFT COAL.

Specification of Letters Patent No. 21,046, dated July 27, 1858.

T0 all whom, t may concern:

Be it known that I, MERRIMAN P. DoRscI-i, of the city, county, and State of New York, have invented certain new and useful Improvements in Stoves for Burning Soft Coal and Its Gases; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the accompanying drawing, marked Figure l, and which represents a vertical central section through the same.

In the burning of soft coal in stoves, many contingencies arise that are not encountered in the use of hard coal, as for instance, open grate bars cannot be advantageously used wit-h the former, while they are indispensable with the latter. Draft through the grate bars with soft coal, when sufficient for ignition, drives off the combustible gases without burning them, and thus there is much waste of fuel. Soft coal packs to such an extent, as to make anything like regular draft in an ordinary stove out of the question. By my arrangement I no-t only provide sufficient and regular draft, but through the same sources which supply atmospheric air to support ordinary combustion, I also get a volume of highly heated air that is thrown in jets into the gases evolved and thus burn the gases also, by which means I effect great economy in the use of soft coal, in stoves.

Now, I am aware that a perforated cone has been used in the center of a fire pot or box. I am also aware that atmospheric air has been jetted into the escaping gases, to effect their combustion, and that a rosette has been used for this purpose. Individually I do not claim these things; but I am the first to combine the benefits of a perforated cone, and a perforated rosette in one stove, so as to avail myself of the advantages of each, as follows:

A, represents the outer case of an ordinary upright coal stove; B, the fire box, and C, the ash pit, a, the door for supplying fuel, Z9 the door, or pan opening for the ash pit.

c, is the exit pipe, the smoke rising up over the top of the conical case D, and thence diving to the exit pipe c.

The grates, are made like a register-the lower plate 1, being stationary, and the upper one 2 movable, by means of a handle d,

so that the register may be opened for clearing out the fire box, or for starting the fire, and then closed again when the fire is burnmg.

In the center of the fire box B, I place a perforated cone E, which is open at its bottcm, so as to receive the necessary air to effect the combustion of the coal :as well as its evolved gases, and on top of this perforated upright frustum of a cone (E,) I place an inverted perforated frustum F (which I call a rosette), with a closed cover e on it.

The fire box is charged with coal up to about the red line w m, or to any point below the apex of the perforated cone E. rlhe combustible gases which are evolved, more particularly around the cone, ascend, and are deflected by the overhanging sides of the rosette, and at the same time they receive from the holes or openings in the rosette jets of highly heated atmospheric air, which minglingwith the gases admits of their being almost entirely consumed. It is ascertained that to burn gases, the air introduced for the purpose must be highly heated, otherwise there is no economy in the result. The air which I thus furnish in passing up through the center of the burning mass, is highly heated, and in this heated state mingles with the gas.

I have found by actual experiment that a stove, constructed like the within described, burns soft coal well, and with very great economy, inasmuch as there is uniform draft, and an almost entire ignition of the volatile gases.

Having thus fully described the nature and object of my invention, I would state that, I am aware a perforated cone for admitting jets of air to fuel, is not new, I am also aware that, a rosette furnished with holes has been used. I do not therefore claim either of these things individually, but

What I do claim as new, and desire to secure by Letters Patent is- The combination of the perforated cone and rosette when arranged with the regard to the fire box, and operating as herein set forth and represented.

MERRIMAN I. DORSCH.

Witnesses:

CHARLES A. BONNY, C. S. NEwnLL. 

